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Evaluation of manufacturing deviations of composite materials
Author(s) -
Willberg Christian,
Heinecke Falk
Publication year - 2021
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.202000345
Subject(s) - finite element method , reduction (mathematics) , stiffness , peridynamics , structural engineering , process (computing) , computer science , materials science , composite number , mechanical engineering , mathematics , algorithm , engineering , mechanics , physics , geometry , continuum mechanics , operating system
Abstract Manufacturing induced imperfections in composites lead to a reduction in the performance of the structure. In order to carry out repairs only when they are really necessary, evaluation capabilities to determine the strength reduction are required. Two methods of evaluation are presented: a finite element based and a Peridynamic based approach, respectively. The finite element based process is used to evaluate stiffness and strength reduction. This processes currently doesn't include progressive failure analysis. Hence, the peridynamics process serves among other things to verify the prediction by the finite element model. Because, the correspondence formulation is used, integral Cauchy stresses are obtained for the laminate and can be verified. Progressive failure analysis is then used to evaluate whether the first ply failure approach used in the finite element model is accurate enough to ensure strength reduction values.